Thermostatic fire-alarm.



c. 1.\ om. THERMOSTATIC FIRE ALARM.

APPLICATION FILED JAN. 28. |916.

INVENTOR C. J. Cid 5 d f ,y 77d ff) 6:7

VTNESSES C. J. CID.

THERMOSTATIC FIRE ALARM.

APPLICANDN HLED 1AN.28.19|6.

1,21 5,485. Patented Feb. 13, 1917.

2 SHEETS-SHEET 2.

INVENTOR Cd Cid WITNESSES UNITED STATES PATENT OFFICE.

CESAR JOSEPH CID, OF QUEBEC, QUEBEC, CANADA.

THERMOSTATIC FIRE-ALARM.

Application filed January 28,1916.

To all whom t majl/ concern Bc it known that I. CESAR .losnrI-r Cin, a subjectoi the King of Great Britain. residing at 333-335 St. Paul street, in the city of Quebec, in the Province of Quebec, Canada, have invented certa-in new and useful lmprovements in rlliermostatic Fire-Alarms; and l do hereby declare that the following is a full., clear, and exact description of the same.

The invention relates to improvements in thermostatic fire alarms andthe object of the` il'ivention is 'to provide an apparatus which will sound a series of alarms tor indicating a sudden or excessive rise in temperatu're.

The apparatus is so constructed and arranged that upon a fire breaking out in any room where it is installed, it may sound an alarm indicatingr that certain temperature has been reached and it is so adapted that a second alarm will be rung and a circuit closed should the temperature reach a predetermined rhigher degree of heat. This circuit may be adapted to operate a water sprinkling system in the room in which the .fire has started.

lVith the above general objects in view the invention consists in the novel construction, combination and arrangement of parts illustrated in the accompanying drawings.

Figure 1 is a front elevation of the invention, part ot the casing having been broken away.

Fig. 2 is a side elevation. a portion of the casing havingbeen broken away.

`Like references of character denote like parts in all the figures of the drawings.

VVith-referenceto the drawings. 1 is a casing .hav-ing a` lower open end 2 and a clock-shaped head 3. and .4 is a back plate having the shape of the casing and hinged atzits lower end. The said back plate 4 carries thedii'lierent parts of the alarm and is so arranged that it may be opened should any repairs be necessary7 to the mechanism ot the alarm.

5 is a clock hand mounted on a short trans versal shaft 6 secured at the center of the round head 3, said shartt being supported in suitable bearings and 7 is another clock hand or indicator, rigidlv mounted on a collar S. which is loosely mounted on the shaft 6.

9 is a circular plate or dial suitably graduated to indicate the diiierent degrees ot' temperature, said dial'9 being secured in .the

Specification of Letters Patent.

Patented Feb. 13, 1917. Serial No. 74,948. i

head 3 to the brackets 10, and 11 is a glass provided over said dial'and secured in the tace of said head.

12 is a thermic cell of the well known type which expands when it comes into contact with heat. said cell or disk being suitably supported in the bottom of the casing 1 to the back plate 4. l

13 is a perpendicular rod sliding in the bracket 14, slightly bent toward its upper end and provided with a` rack 15 which engages a gear 16 mounted on the collar 8, said rod having at its lower end an insulatingA block 1.7 secured thereto and resting on the cell 12.

1S 'is a cross bar rigidly secured at one end to'the lower end oit the rod 13 and sliding at the other end in the bracket 19 which is secured to the back plate 4.

20 is a perpendicular rod passing through the bracket 21 which is secured to the back plate 1, said rod being slightly bent toward its upper end and provided with a rack 22, which engages the gear 23 which is rigidly mounted on the shaft 6, the lower end of said rod beingprovided with a weight in order that it may continually rest on the arm 24 which is pivotally secured to the lug Q5 projecting from the bracket 26, said bracket '26 having a lug 27 centrally bored in which threads a hand screw Q8. The arm 24 is so bent at one end that the end of the hand screw vQRS will serve as a lever in order to adjust said arm to a desired height. The other end of said arm is provided with a flexible curved bar 29, which is adjustably held in a desired position by the adjustable screw 30. which is secured at one end to the outer end of said exible lbar29 and passes through' the arm 2,4. and is adjustably held by means of the nut 31.

32 is a suitably shaped piece of insulating material secured on the outer end of saidbar 29, and 33 is a fiat spring secured to one end of the arm 9A- and adapted to keep said arm in` its normal position.

34 is a pole electrically connected to the arm Qi by means of the contact plate 35 and 3G is the other pole which is electrically connected to the bracket 14. `The said poles 36 and 34 are electrically connected to anyv suitable outside sourceof current by means of the wires 37. A bell or other indicating means is connected to said wires 37, but it is not shown in the drawings.

38 .is a contact plate and 39 and 40 are the poles which are electrically connected to a bell. or a light or to both of them by means olj thc wires 4l, and 4t2 isanother contact plate provided with the poles i3 and Lle-, which may be arranged to be connected to an electrically operated water valve, controlling .sprinklers in the building by means of the wire lt may be here stated that any convenient source of current may be connected to said poles 39, 40, 1113 and 44.- and these poles are absolutely independent of the poles 34- and 36.

ln the operation of the invention it will easily be understood that as the temperature rises, the thermic cell l2 will expand gradually and as it expands it will carry with it the rod 13, which rests thereon, together with the bar 18 which at a pre-determined temperature regulated by the hand screw 28 will come into contact with the bar Q4, thus loriuing a circuit with the pole 36, through the bracket lil, tluough the rod '13, the arm Q11-, the contact plate 35 and the pole 341i, thus ringing the bell or putting` into operation any other suitable alarm device. rlhis circuit will put into operation, what may be called, a lirst alarm, but the device is so arranged that a second alarm may be rung at a pre-determined higher temperature and this is obtained by the arm Q4 which gradually pivots on its lug 25, thereby, as the temperature rises, causing the insulation block 32 to press on the contact plate 38 and cause a circuit between the poles 39 and 40.

Should the temperature rise above this predetermined point, automatically a circuit will be made between the poles 24 and d3 by the insulated block 82 on the end of the arm 2e which may then put into operation, the sprinklers. l

ln order to determine at what temperature the first alarm will be rung, the hand screw E28 must be screwed, thereby lifting the arm 24 and the rod 20, which will cause the gear 28, the shaft 6 and the hand 7 to revolve accordingly.

llVhen the thermic cell expands under the increasing temperature, the rod 13 gradually rises with said cell and causes the gear 1G, the cellar 8 and the indicating hand 5 torotate, thus indicating the degree of temperature as it gradually increases.

lt must be understood that the constructional details of the herein described invention can be modified it found desirable so long as it does not depart from the spirit of the invention, which is claimed in the following claims for novelty.

lllhat l claim is:

l. ln a thermostatic tire alarm in combination with a thermic cell, an insulated rod resting on said thermio cell, a pole electrically connected to said rod, a bracket provided with an outwardly projecting lug, an

nain/ies arm pivotally n'louuted on said lug, ay pole electrically connected to said bracket, means to adjust said arm and. contacting means between said rod and said arm in order to close the circuit, a number of poles electrically connected to a corresponding number et contact plates and means provided on said arm to successively close said contact plates and form a circuit in relation with the poles.

ln a thermostatie Tire alarm in combination with a thermic cell, an insulated rod resting on said thermic cell, said rod being provided with an inwardly projecting arm, a pole electrically connected to said rod, an arm pivotally secured at one end to a bracket, a pole electrically connected to said bracket, means to adjust said arm, poles electrically connected to contact plates, means provided on said arm to close the contact plates and form a circuit with their respective poles and means to regulate the time to close said contacts at a pre-determined j temperature.

3. ln a tllcriuostatic Vlire alarm in combination with a thermic cell, an insulated rod resting on said thermic cell, provided with an inwardly projecting arm, a pole electrically connected to said rod, an arm pivotally connected to a bracket, a pole electrically connected to said bracket, means to adjust said arm, means to carry said arm from its abnormal position to its normal position, series of poles electrically connected to contact plates, means provided on said arm to close said contact plates and form a circuit with their respective poles, means to adjust the time of contact to a predetermined temperature and means automatically to indicate the degree of temperature as it rises.

.fr In a thermostatic fire alarm in combination with a thermie cell, a red resting` on said thermic cell and insulated therefrom, said rod being provided with an inwardly projecting contact arm, means provided at the outer end of said rod to indicate the degree of temperature, a pole electrically connected to .said rod, an arm pivotally connected at one end to a bracket the other end oit said'arm being` inwardly curved, means to adjust the arch of said curve, means to adjust said arm, means to carry said arm back to its normal position, a pole electrically connected to said bracket, a rod suitably supported and resting on said arm and means provided at its outer end to indicate at what temperature the said arm has been adjusted, series of poles electrically connected to contact plates, said plates being automatically closed at successively pre-determined temperatures by means of said curved end provided on said arm.

5. In a thermostatic fire alarm in combination with a thermic cell, a rod resting on said thermic cell and suitably insulated therefrom and provided With an inwardly pro jecting contact arm which is adapted to slide in a suitable bracket at its outer end, said rod being suitably supported by a bracket intermediate thereof, a rack provided at the ripper' end of said rod adapted to engage al gear mounted on a collar and an indicating clock hand mounted on said collar, said collar being loosely mounted on a shaft. a pole electrically connected to said bracket supporting said rod, an arm pivotally connected at one end to a bracket and provided with a boss, an adjustablel screw suitably supported in said bracket and adapted to enga-ge said boss in order to adjust said arin, said arm being arched at its outer ond, an adjustable screw being provided in said arm to adjust said arch, Said arch being provided with a contact block of insulatilig material, a flat spring secured at the other end ol'` said arm and adapted to carry said arm from its abnormal position to its ni'irmal position, a pole electri ally connected to said bracket, a rod suitably sup ported by a bracket and provided at one end with a Weight which rests on said arm, the other end of said rod being provided With a rack engaging a gear mounted on said above mentioned shaft and a clock hand mounted on said shaft indicating the degree of temperature to which the said arm has been adjusted, series ot poles electrically connected to Contact plates, said insulating block on the end of the pivoted arm being adapted to gradually close one contact plate after the other and form a circuit in relation With their respective poles as the arm is gradually forced upwardly by the contact arm mounted on said rod which in turn is liltcd by the expansion of the thermic cell.

Signed at the city of Quebec, Canada, this eleventh day of January 1916.

CESAR JOSEPH CID. litnesses Romcri'r Pn'iuiunnw, FonnAD Cin.

Copies of this patent may be obtained for ve cents cach, by addressing the Commissioner of Patents, Washington, D. C. 

